/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/PBDRigidsEvolution.h
Enable a particle.Only enabled particles are simulated. If the particle has constraints connected to it they will also be enabled (assuming the other particles in the constraints are also enabled).
void EnableParticle ( [FGeometryParticleHandle](API\Runtime\Chaos\Chaos\FGeometryParticleHandle) * Particle )